Point of Interest. Although I don't have any information on the 1st Ala Siege Art of African Descent I would like to say there is a book entitled "Railroad War - N. B. Forrest's 1864 Raid Through Northern Alabama & Middle Tennessee" by Robert Dunnavant, Jr. (Athens, Alabama 1994)which gave a very good treatment of the subject of U.S. Colored Troops. In the appendix is a list of Colored Troops who were taken prisoner at Sulfur Creek Trestle. The list was published in the Mobile Advertiser and Register of October 6, 1864 and lists only their first names along with their owners and the county in which they lived. They mostly appear to have been from the Northern Alabama counties and Tennessee counties which border the Ala-Ten State line. There were even a few from Northeast Miss. Mostly areas under Union occupation in 1864.
The units were the 106th, 110th & 111th U.S. Colored Infantry[s]. Once captured they were sent to Mobile to work on the defences and the advertisement was placed by the Confederate Engineering Corp in an effort to notify their owners that they were available to be returned.